The spatial relationship between the camera and various objects within the field of view of a scene.

Perspective is the spatial relationship between a camera and the things the camera is photographing. If two objects of the same size are in the scene and one is much closer to the camera than the other the closer object will appear to be much larger than the further object. If the two objects remain the same distance from each other but the camera distance is increased from both then the apparent size difference of the two objects will decrease.